Smoke alarms should be mounted in or near bedrooms and living areas, either on the ceiling or the wall. Ceiling mounting is typically preferred as it allows the smoke alarm to be placed more centrally in the room. If wall mounting is used, it's best to use an inside wall to avoid thermal air currents that can occur along hot or cold walls. Our units have been tested and will perform between 40 degrees and 100 degrees Fahrenheit.
Carbon monoxide (CO) and combination alarms should be mounted in or near bedrooms and living areas, on a wall placed six inches below the ceiling to six inches above the floor. If mounting on a ceiling, make sure it is at least six inches away from the wall. Because carbon monoxide is almost the same density as air, it will disperse evenly throughout the air in a room. Our units have been tested and will perform between 40 degrees and 100 degrees Fahrenheit.
If your home has a hot water heat system or boiler, it's recommended to place a CO alarm in the boiler room and also in the room above or adjacent to the boiler room for the quickest response.
We recommend installing a carbon monoxide or combination alarm on each level of a multi-level home. You can use the number and location of smoke alarms installed in your home, according to current building code requirements, as a guide to the location of your carbon monoxide or combination alarms.
If the home has only one carbon monoxide or combination alarm, it should be installed in the main bedroom or in the hallway outside of the sleeping area. Here are some guidelines for placing a single carbon monoxide or combination alarm:
Caution: Carbon monoxide alarms will only indicate the presence of carbon monoxide at the sensor. Carbon monoxide may be present in other areas of your home.
Heat alarms should be mounted either on the ceiling or the wall. We recommend installing a heat alarm in areas where temperatures may be extreme, such as in an attic or garage.
Note: 135-degree heat alarms are typically not suitable for use in the attic, as most unfinished attics will exceed the operating temperature of the alarm. Heat alarm model number HD200F would be suitable for this use with a SM120X Relay Module for smoke and a CO120X Relay for carbon monoxide.
We recommend referring to your current building code requirements as a guide to the location of your alarms.
Important: Improper location can affect the sensitive electronic components in an alarm.
For more information about your specific alarm, refer to your user’s manual.
If you have any questions or need further assistance, please don't hesitate to contact our customer care team.
They are available to help you with any concerns or inquiries you may have. Reach out to us for support, and we'll be happy to assist you!
Looking for the best smoke detectors? Learn where to place smoke detectors, learn about types of fire and smoke detectors types, then choose the best smoke detector.
Know the best locations to install your carbon monoxide alarm in your home.
Wireless smoke alarms have a signal unique to the model that will wirelessly connect with others in the same model series.
Learn more about the products that will interconnect with Firex alarms.
The differences between the hush and smart hush features.
The National Fire Protection Association (NFPA) is a nonprofit organization that works to reduce fire-related hazards and afflictions by providing codes and standards, research, training, and education.
Learn where to place fire extinguishers in your home.